James e



(No ModeL) J. E. BROWN.

EXTENSION OHANDELIER.

Patented May 9, 1 882.

UNTTED STATES PATENT @rrrCa.

JAMES E. BROWN,.OF BROOKLYN, ASSIGNOR TO THE ARCHER AND PAN- GOASTMANUFACTURING COMPANY, OF N ElV YORK, N. Y.

EXTENSlON-CHANDELIER.

SPECIFICATION forming part of Letters Patent No. 257,547, dated May 9,1882.

Application filed April 8, 1882. (No model.)

To all whom it may concern:

Be it known that I, JAMES E.Bnown, of Brooklyn, county of Kings, andState of New York, have invented certain new and useful Improvements inExtension-Ohandeliers, of which the following is a full, clear, andexact description, reference being had to the accompanying drawings, andto the letters of reference marked thereon.

My invention has relation to that class of extensionchan deliers,gasaliers, or drop-lights wherein the vertically-adjustable tube or rodis twisted or otherwise formed with spiral ribs, which, as the tube orrod is moved in a longitudinal direction, communicate a rotary motion toa surrounding block or washer, which in turn is connected with thefriction-producin g appliance.

The object of my invention is to produce a simple, compact, durable, andeffectively-operatin g clutch mechanism for holding the droplight tubein any position to which it may be adjusted, and which will admit of thedroplight being raised with little or no effortbeyond that required forovercoming its weight.

To this end my improvements involve certain novel and usefulpeculiarities of construction and relative arrangements or combinationsof parts, all of which will be herein first fully described, and thenpointed out in the claims.

In the accompanying drawings, forming part of this specification, Figure1 is a longitudinal section and partial elevation, showing my improvedclutch in the position it assumes when holding the central tube or rod,or when thesame is being forced downwardly; and Fig. 2, a similar view,indicating the position assumed when the tube or rod is being elevated.Fig. 3 is a plan of the lower part of the clutchcasin'g with thefriction-spring in place, the cap and revolving block being detached.Fig. l is a perspective view of the friction-sprin g shown in formerfigures, and Fig. 5 a similar view of the revolving block which engageswith the spring.

In all these figures like letters of reference, wherever they occur,indicate corresponding parts.

A is the central tube or rod intended to carry the burner or burners,and made adjustable vertically for the purpose of raising or loweringthe light.

B is a gas-conducting tube or other tube or support for the clutch, fromwhich side pipes may be extended, if desired, and within which the pipeor rod A slides up and down. Upon the lower end of tube 13 the casing ofthe clutch mechanism is secured by screw-joint, or in other suitablemanner. The clutch-casing is composed of two main parts-the base orbottom part, 0, and the cap or cover D-eonnected therewith byscrew-joint or equivalent.

Within the base (J is a hollow standard, E, between which and the wallof the [base there is an annular chamber for the accommodation of thefriction-sprin g F. This friction-spring is bent substantially as shown,so that it may travel around in the annular chamber provided for it andbear against the wallet the base, as well as against the hollowstandard. The revolving block G has a serrated flange for engagementwith the fold of the spring F, and it is made to turn by the spiralflutes or projections upon the pipe A, which, as the said pipe moves upor down, bear against the margin of the perforations through the block.

When the sliding tube is pulled down the block turns, and with it thespring F, the latter producing sufficient friction to hold the rod ortube A secure against any accidental slipping down, or sufficient toprevent it from being lowered unless by application of force in additionto its weight and the weight of the attached parts. Abovethe centralstandard and beneath the flange a of the cap the revolving block hassufficient room in which to be elevated, so as to disengage the teeth ff of the serrated flange from the spring. As soon as the rod or tube Aiselevatedit carries the block up with it, releases the spring, and theblock is thus left to turn freely, enabling one to elevate the slideeasily and without the produe tion of any undue friction. The spring isof course gaged in strength to correspond with the weightrequired to besustained. The spring being free at both ends, and only one ratchet orserrated block required to effect the clutching and unelutching, I amenabled to dispense with large and cumbersome constructions, to

The central rod or tube may be kept from turning by any preferredarrangements.

It has not been deemed necessary to illustrate the burners. Of coursethese may be of any number and maybe disposed as best suits the taste.

The invention is peculiarly applicable in gasfixtures; but lamp or otherburners may be connected with the central tube or rod, and generally theimproved device is adapted for use in any situations where it is desiredto hold the slide, as above indicated.

The improvements will be found in practice to answer all the purposes orobjects of themvention, as previously stated.

Having now fully described my invention, what I claim as new herein, anddesire to secure by Letters Patent, is-

1. The friction-spring bent as explained, and bearing against the wallsof the annular chamber formed in the clutch-casing,said spring beingmoved by the turning block as the sliding pipe or rod descends,substantially as and for the purposes set forth.

2. The spiral pipe or rod, the bent frictionspring located and movablein an annular chamber formed in the clutch-casing, and the turning blockhaving a serrated flange, the teeth of which engage with the fold of thespring, the several parts being combined and arranged substantially-asshown and described.

3. The combination of the spiral pipe or rod, the clutch-easing havingan annular chamber formed in the lower part, the bent spring bearingagainst the walls of said chamber, the turning 'block having theserrated flange made to engage with the spring during any downwardtendency of the slide, and to release the spring when the slide iselevated, and the removable cap, substantially as and for the purposesset forth.

In testimony thatIclaim the foregoing l have hereunto set my hand in thepresence of two witnesses.

JAMES E. BROWN.

Witnesses:

A. H. Nouns, BENJ. F.'ALLEN.

